Portable pneumatic drill.



No. 871,939. PATBNTBD Noxnze, 19o?.

` 1M. KMMAN-- K I PORTABLE PNBUMATIG DRILL.

APPLXUATION FILED JAH 15; i507.

8 SHEETS-SHEET 2. v

qvihieoxa PATENTBD NOV. 26, 1907.

J. KIMMAN.

PORTABLE PNBUMATIG DRILL.

APPLICATION FILED JAN. 15, 190% Wal wie 1 PATBNTED NOV. v26, 1907.

f1.5. KIML/um.

PORTABLE PNLUMA-Hc DRILL.

APLICATION .FILED JAN 15.1907.

8 SHEETS-SHEET 5.

@N @NNNQ PATENTED NOV. 26, 1907. H. J. KIMMAN. PORTABLE YNEUMATIC DRILT.

LYPLIOATIOH FILED (IAR 15. 1907.

8 SHEETS-SHEET 6.

PATBNTED Nov. 2e, 1907. H.J.K1MMAN. PORTABLE. PNBUMATIG DRILL.

APYLIOATIOH FILED JAH. 15. 190'?.

SHEETS-SHEET '1.

warum @a O//f PATENTED NOV. 26, 1907.

H. J. KILMMAN. PORTABLE PNBUMATIG DRlLL.

APPLICATION FILED JAN. 15| 1907.

8 SBEETB- SHEET 8.

5ans: u tot wenmm 'UNrriiD s'rArEs PATENT orifice.'

HENRY JAMES lil-MMAN, Ol" CLEVELAND, OHIO, ASSIGNOR T0 CHICAGO PNEUMATIC TOOL COMPANY, A CORPORATION OP NEW JERSEY.

PORTABLE PNEUMATIG DRILL. i

Appiano ned January 15.1901; sriairaazcis. u

To all inlmm it 'mail concern:

e. it. known thaty 1 llizxar J. Kim/mu, a citizen of. the l'fiiited States, residing in the. city ol' Cleveland, county of Cuyahoga, Stute ot' Ohio, have invented a new und useful lortahle lneuiiiatic lli-ill, of which the following is :i speeilication.

ln prior patents granted to nie August sth, isos, \o,o:;o,:i57, and July' 10th, 1900', No. tiilfilh, l have. shown, described and broadly claimed a novel construction of thiid pressure enginesl or motors portable in their nait iii-e und adapted for the operating of drills, reaiiiers :ind other tools and mechan-4 isius for use in assisting hund luhorund niininiizing thi-'enst of ronstioution and production oi' structural appliances und devices.

ln inv prior pateiits'l employed at least two sets ol lluid pressure rylindeis arranged in parallel lines, a i'eeipi'oeating piston in erich cylinder, a rotatable crunk shalt conloi' iiat'li lint* ol "ll'd and a drill holding mechanism connectedr with therranh shalt. and :irriinged to be driven thereby.

. ln niy present invention, while taiiployiiig sonie ol t-lie general features of luy prior pat-- ents i-eleired to, l have in addition, reorganized and iiiodilied the principal coactingelel liients so that h r assembling the. v alves and pistons` :ind their enacting devices in a novel and more compact manner, l ani enabled to reduce the thickness und weight ol' the. tool, und hv the employment of a novel construe: tion il elongiited easing, l aiirenablethto provide ii gear easing -and train of gearing which is adapted to actuat-e an eccentriciilly loi-ated drill spindle having hearings in the extreme end ol" theeiising, whereby l aiu eniihled to utilize my novel drill lor drilling in close quarters und particularly inv corners where ity luis heretofore heen customary to perform the drilling, reanuiig operations and the like nsuiuiilly or h v hand, it heing app'arent that sinee the Yspindle ol niy novel tool is driven by gears instead of on the mtg-liet. principle, a steady, const-:int and linil'oiiii ifotat ion ol' the spindle is insured`and all the parts are sell' contained in oy neat and eoiiipaet. eiisiiig,wlrieh, although readily aeressihle :itiill t'iii'ies` lor the purpose ol' inspi tion and repairs, proteetsthe niechanisiu und all iuoriiig parts from injury.

'l`o the above ends my invention consists Specieaton of Letters Patent..

lPatented Nov. 26, 190'?.

.broadly in the present instances, of .'our singlo actin(r cylinders arranged in pairs one above and one below, with the valves located between siii 'l cylinders and ireferably in line therewith, each pair of cylinders being arranged at approYniiat-ely ninety degrees with the other. A

By reason of niy novel Vconstructionmld cc" .elation of the parts, I am enabled to employ a divided crank shaft having a double throw with its `pins set opposite to each other and each one of a. pair ot pistons is coupled to one of these pins. lBy reason of this construction, a perfect balance of the reciprocating part-s is insured, since the4 pistons thus eomiected always niove in opposite directions, one to the other, and inasniuch as cach pin has two pistons connected toit and es these. pistons cre. *set at ninety degrees, it is impossible for the motor to stop on the dead renter, since by this arrangement' one piston 'at least is always under full pressure of the :active tluid. l fi ther locate the center of the shafts within the cylinder so that the. cellter is provi ed with an eccentric, set in yproper posit-ion to give thccorrcct distribution of, the motive fluid to. the desired ioints, said eccentric being provided with two 'soV straps, each of which is connected to one of It further consists of-a novel manner of supporting und actuating the eccentric, with respect to the cranks, -wliercby the cranks, pistons, valves and their edjuiicts can be as- `serribled in a very small compass.

The invention further consists of other novel features of construction, all as will be hereinafter fully set. forth, and particularly pointed out in the claims.`

For the purpose of illustrating my invention, I have shown in the accompanying drawings one foi-in thereof which has heen found iii practice to give satisfactory and re.-

i liable results, although itis obvious. that the.

various instruinentalities of which my invention consists can be variously arranged and organizi d arid that my invention is not liniited to the precise arrangement and or runizatioii of these instrumentalities, as in t ie einliodiiuent herein shown.

Figure 1 represents a crspective View of aV portable pneumatic drill embod Ying my invention; Fig. 2 represents a ongitudinal section on line y-y Fig. 3. Fig. 3 represents a section on lineI Fig. 2. Fig. 4 repre- 110 scnts a section on line z-z Fig. 3. Fig. represents a plan View ol the casing, showing certain portions broken away for the sake. ol' clearness of illustration. Fig. represents a plan 'view of the. casing showing certain portions as the upper cylinders and their adjuncts, removed. Fig. 7 represents a plan View of the casing partly in section. Fig. S

represents n sectional view through the gear casing with the. gearingremoved. Fig. tl represents a perspective view of the ecc`entric straps in detached position. Figs. ltl and ll represent perspective views of one of the cranks, the eccentric therefor and their fuljuncts. Fig. l2 represents a. ierspmztive viewof one of the. valve bushingsindetached position. Fig. 13 represents a perspective view of one of the valves employed, partly broken away to show the hollow exhaust portion ci the same. Fig. 14 represents an end view ot F ig. 8.

Similar numerals ol' reference indicate corresonding parts in the iigii'res.

eferring to the' drawings. in its broad aspects my novel drill cinhodiesa central casing in which the gearing and volge ineehcnisin are contained, side. engine. casings containing n pair of engines, each set at subst antially right angles and at one end a combined handle and inlet connection for the motive fluid and a. drill socket with a feed therefor at. the' end opposite seid handle. The engines arcso placed as to form pairs, the two pnirs of engines thus occupying two planes at suhstantially right angles, each pair within a plane. being actuated by a single intermedi. atc distribution valve.. The train of gearing is also arranged between the engines and so combined with thc valves as to allord a-inaximum of strength with a minimum of torsio i and with a ininiinuin length of tluid passages between each valve. and the engines controlled thereby. At the slime. time, Athe crank shafts are. made seimrableior the sev eral engines upon the sinne. side of the gear casing and all parts are readily accessible.

1 designates my novel drill having the gear casing 2 r-.nd the up ier and lower engine casings and 4. The liandle 5 which is located )refer-ably at the. extreme end ol' my mechanlsin from the drill chuck thereof and at. right angles thereto is used as an aiiinlet. tube, the supply of air for which is controlled by the. sleeve 7 acting upon the iin ti b v means ot im eccentric slot, said handle being threaded at 8 into a boss .l connecting the handle with tile central casing oi' l'ranie 2. 'lhe passage l'l) in theboss leads into passages l1, which supply motive lthiid to the engine cylinders through two tubular valves hereinafter described and best illustrated in Fics. 3 and 13. The passages or channels 1l concuct the niotive tluid into the openings 12 and 13 respectiveiyb'in the two valve chambers from whence the tluid is distributed by means ot the valves' as will be described.

The engines of my drill are preferably four in number arranged in two casings C5 and ll, one upon the u-pper and the other upon the. lower side ot' my gear casing, one engine in each lill' these casings heilig parallel with an engine in the. other easing. '.llic valve controlling these two parallel engines lies in the plane. between; thus with respect to the valve mechanism, the engines are divided ditlerently from the, division in their several casings and two engines l'roin ditlerent casings, but lying within the sanieplane, toi-in a pair controlled by an intermediate valve, this pair being duplicated by the other two engines in a plane at approximately right angles to the. lirstplane named. lherc are thus two planes ol engines nt substantially right angles, each controlled by a single. intermediate valve and acting 'upon the saine crank mechanism but at opposite ends thereof. l have indicated these engines by ninahers 14, l5, 1li and 17, ot which 14 and l5 constitine. one pair controlled by a valve chaniheiil, whilethe engines 1G and l? constitute the other pair and are Jonlrclledby a. valve ch'ainher ttl, the relation between the two pairs being as stated right-angular, thus aviiding a dead center under all conditions. The valves for the two sets of engines are substantially alike and comprise prel'erahly the cylindrical chambers ttl and lll, within which l preferably locate bushings 2l through which are formed passages '.22 *and 23 permitting passage of' motive tluid to the interior of the bushing. The passage -22is connected with the supply passage or channel l2 and lidinits live thiid to the center of the bushing-at this point, the live lluid being distributed -therelioin according to require ments. 'l`he`. groove 24 in the bushing 3l `leads troni the passage .23 to the passage 25, by which live and exhaust motive thiid are transmittedto the cylinder shown in Fig. 4 as cylinder lt'softlie pair lt' and l? there illustrated. The groove 36 in the valve connects nir opening 27 preferably in the opposite side of the casing .l from the openings 2 and 23 with'tlie/ mssage 2S, by which live .and exhaust'iluii are transmitted to and from the. engine 17.?"1`he openings or ports lll 'and 3() 'm the. piston valve Ill connect with the hollow center or -exhaust. portion of this valve. Ill which is open troni the Ipointt) to the. opposite end from the eccentric, in order to permit {"ee tlow of the exhaustv through these o ienings 2t) or 3U according to the engine ex iaiistii'ig into the space. 32 at the end of the valve. chamber frein which the exhaust is freely carried te the atmosphere by the port 33. In practice i. recess the casing o r bushing 21, as at 34 and 35, in order, to lighten thc saine.

i l i it, will lhe evident thv*` with live motivo lluid in tho' pussugo 22 und thu valvo'in thc position shown in Fig. 4, Lluro will bo fruo uootss of livc lluid nrouud tho vulvo 3l at its groot-'c or oircuinl'ol'ontiul roooss :Ztl through p-issugvs '.57 und 12S into the cylinder of vngino l? fort-.ing tho piston 37 thereof to the lultI of the position suon in Fig. 4 or ontwardly. At the suino tinto, the. piston 38 of engine 16 will bc lnoving toward thil piston head und exhaust, of tin.` motive liuid in said -cnginei will take placo through tho` pussugcs 25, 24,23, port 30.. tho ocntor of tho vulve 3l, the spaces 1&2 und thol exhaust. u-perturu 253 in the onp 5G.

'hon tho vulve. is rtf-versed in position,

'which will occur at tho opposite ends of the in position-to exhaust through passages 2$,`

27,29, the conter of the valvo 3l tlimnbor 32 and the exhaust. upvrturu 33. Tho otlur pair of engines 14 and 15 with thon oonunon Valve will operato in the sanno nmnnoihut will ha timtd approximately n quarter of :a strokn tlitftrontly from tho two vnginos which hun'o justy boon coiisidortd, so that ono of tho fout' single noting vngints will ho operating :it mush of tho four qunrtvrs.

'l`lupistons uro pl'tfl'trnhly of n sinulo :wting typo, hollow und oonlwtttd with tlul piston rods 4l), il, #l5 mul "tt hy n tonns ol" thtgsunu typo ol hull und sor-kot Vnunet-tion oritsttplivulout 17. '-l-`ln\.tontu-t-tion ol'uni'h piston rod 4with th't` t'rnnk in n. given puit: in tht` suino pluno is thv sunto, hut thi' ('onum'- tion ol". tvo piston rods or onginvsiin tho sunu` ougiuo using ns vngiuos t4 und -lt 'vui'its somewhat.. (ino puit' ol' vonnt-t'tions will hu dostfrihttl; taking ongints l5 und lt ns u'typo, whit'h nro ronnootod suhstuntiull)Y ns "ngints llund ltt. 'lho ('oinut'ting rods 45 nnd "lt uro 'onnot'tod hy :nouns ol u strvw cup 4S and lotlt :uit with n split 'oupling or homing t-oin'post'd of two lilt'o strzips or prnis 4t), nach lut-'Jing u rot-ess 5t) und upvituro .'l hv whit'li connut-tion isjnmhwith thv onlnrgtintnt. 52 ol' tlu rods i5 or 4V, in ordor '1.o provvnt. longitudinal ntowlnvnt tlurool.v

nvotions in stu'h lortu us to vut-irt'h thu vrnnltthrough tht` norlnul lmigth ol' tht` sli'np 4t) and also tfho Aoxtcnsion 52 As 'ust pnintvd out, tho liktv parts 4l! nrt unitotl und lwhi in tontnft. wit-h tho rod 't5 or tti h v nwuns of thv st'row wip 4S .Vith thu purts surrounding tho crunk 55. 'fluv uit' hohl ut. tlux vnd :it which thoy surround thtl t-ru'nlt in unothtr inunntr, nntking thv jun"- tion httwvon thcso pui'ts lrinund stt'ui'o und nvoitiing inoveniont. thtrcol'. 'lhis is dono h); nit-uns ot' n Yoko 36 ronnvctod with cnr-h ot tln` piston rods 43 und 44, tho yoke 36 upon tho piston rod 't4 surrounding tht` 0xttusions :355 stt'urutl to the piston rod Ltt. whtrt'us tht` volte 3o soturvd 'fo thu piston rod 43 surrounds thv intrusions 53 svturtd to piston rod 43. '.lhc volw 3G stl'nildh's thtniuin portion 57 of tho homing ol thtx strop lornicd hy purts 4U und inuintuius tlu` ox tvnsious :32% thtruoi' in close vontut't'. 'l`| \t" Yoko Siti is uistfforinod of two liltu purts 5s, son Fig. .l, w hii'h un` split iu the plain'.- of thttrunit pin und whit'h uro united nttheir tntls nourtst tho piston li); :i st'row t'np connotation 4S und uw hohl troni longitudinnl inovtntcnt with rvtoruiivo to thv piston .rod hy invuns ot vnlungtinontl 52 upon tlu piston rod fitting into u root-ss 5]) within t-htuuoting parts. Ai. tho outa-r rnd oi th prix', "iw ports nr l unitul h pins t'. through ovr-rluppinlhr llnngus or unis t'ii upon tht' lilcv yolw parts. it. will thus ho soun that thu voltix connut'- tion ol' onvol' tlupiston rods with ltlul (frank strnfldh-s und supports tho ronnoution ol tho othvr und that t-:u'h ol' thost tlili'urtnt typos of ronnvt'tion ol tho piston rods of tngints within thv sunto guur tnsiug is stiuroly lustout-d to tho piston rod nl' its oiagino hi|u it,v

is rendit): sopurntvd thuroirom.

' 'l`ho vrnnl: shnlts nro two in in imhc'r uniliing onu rontinuous` l'runk. Thoy consist. ol' two shultstH und (i5 whit-h uro. ltoytd to n tonnuon shtfvo titi whit'h lios lwtwt'tn tht* vngino tusings und within my tontiul (fusing whith l hnvu turmoil n. Q:tnr raising. 'lhs sltvvo titi is 'snpportod ut, opposito meds hy bushings ti? und (is in supports titl und 7U, whit'h in turn' nrc luld hyhrut hats 'Il und 72 uttu'hod to thu guur t'using. 'lho shovt` (t with tht` cranks whitfli :tro kqvtdtlwrtin rotutts within thst bushings 67 und (SS, living supported nt. tho inn-ur vuds t-lu-rohy -uud ut thi` outfit' onds living supportfd hy hvur'ings in tht` ougino rinsing, whith l hnvt illnstrutod us ol tht-v stnno vonstrtu'tion in Aout'h ('nso.' 'illuso huurings consist. o` hulls Til und 7-t nll'ordiug t'ylindrit-ul lu'uriny` upon thoir innor surhn'ts lor tho onds 75 und Tti on" thv two e-runk siuilts und rvsthnK-ut thf'ir outoi' splnrit'ul surhuos in spherical luurings 77 und 7S lornwil hy rtussts 7!) und St) in tho vugino tnsings thtnxsulvos und tot'iptrutiiig rot'osst's Sl und S2 iu'tu'ps S3 und S4 'whit-h uro scri-wml into thv onglnv rusings uty .the lwo p'nirs inthe manner already deserihed.

llpon one ol` the crank shafts us (1A at the end ln proximity to the support or ring (311, l form a'eeess Si', which comets with a recess HG upon im eccentric S7, see lfigs. 11) and 117 which is mounted n1 rotate upon the. exterior surface ol' the ring or heaiing GU, with the result that while. this support und its hashing (1? are stai onnry, the sleeve (5G rotates inside ol' hoin and the eccentric 87 rotates outside olv both in zuzmrdance with the rotation of the crank shafts. 1 preferuhly place the two vulves in the valve chamhers 1S and 11.1 in the sanne plone, so that they may he acted upon hy the same eccentric.

lach piston vulve 31 is preferably provided with an extension 2% from which prol jects laterally a pin Si), as will he understood from Fig. 15. llpon this pin is provided en QoL-.potenz Strap, 11) hy means of an upertured extension .11 therefrom.

have placed my valves hctween the engines where each can most advantageously serve hoth engines ol' its pair and where a single eccentric about o'nc of the central supi irts of my crank shaft will serve heth lvalves and l have also placed the gear 93, hy which the motion of the cranks is transmitted, in appr(ixinuitel)Y the central plane he.- tween my engines, wherehj,r l am enahled to ei-,onoinize space and derive greet advantage as regards torsion upon the shalts und uniform ilistrihution of weight and turning moment in my drill. The geur .13 is preferahly made a part ol the. sleeve (i6, hut may evidently he secured thereto, if-so desired.

-'l`he. cusings containing respectively the engines 14 and 11S und the engines 15 and 17 ure united hy umv suitahle fastening devices ns hy llunges 1H und .15 upon the central cusing und the engil1e rusil1gs respectively and screws .111 and 1H' courting therewith. i have shown the support 722- as ehnnped between the llanges E14 and S15 upon this side ol' the construe-tion, preierahl)` in :i rei-ess therehetween and l'or this purpose have shown the s-;rews J7 us having u greater length thun the .screws 10. '1`h'e hracket 713 muy he integral with the gear casing if sodesired.

ln in v geur casing .2 und ut n. lsuitahle distance l'rom the gean- .l2i, l have placed u stud 9S which l lmveshinvn :is kejved :it .111 into un inwzirdly projeeing holloivboss 1U() und enlarged :it 101 to secure i rigidlvtherein. 'llns stud is supported at its opposite end 102 in a hrm-.liet 11111 secured 1o my geur casing. '.lhe stud JS is surrounded h v a sleeve 11H within :l gear 105 wheh is extended at 101i in the form olY u sleeve, keyed nt 1117 to a surrounding geur IUS, which meshes with u gear 111i. This eonsl-rueiiou causes geur 1111.11, transmit itsmotion to geur 10H which ro tutes uniformly with gear 105. 'lhe geur 105 in turn transmits its motion to a gear i and owing to the employment 1011, which is keyed at to an extension 111 of a gear 112, wherehy the gear 112 and the gear 10S) rotate together ahout a stud 113 on which .sn-id gear 112 is mounted. The stud 113 is screwed at one end 114 into s boss 115 of the gear casing and is supported at its other end 11G in an aperture 117 in the opposite side of the. gear casing. The gear 112 in turn meshes with a gear 11S, which in this eonstruction serves merely as an idler and said gear 118 is lined hy a sleeve or bushing 119 having hearing upon a stud 1Z0-which stud is screwed at 121 into a hess 122 in one side ci the casing and its reduced end 123 has u hearing in an aperture 124 in the opposite side oi" the gear casing. The stud 12() is provided with a collar 125 hy which the gear 118 is maintained in its position longitudinal of the stud. The idler 11S meshes with a gear 126 which is mounted upon the sleeve or tool socket 1"?, the latter serving as a drill spindle..- This tool socket 127 is llauged at 12S to support the .lower half 129 of' a hall race, whose upper half 130 is seated in the sleeve 131 which is screwed at 132 into an eperturc in the gear cnsing. The socket 127 is extended at 1353 within the upper portion 1,30 of the. 'nali race and rotates therewithin.

.The socket 127 at its: opposite end from the hall race is adapted to rotate within a bushing 134 and any suitahle packing 135 held to place hy a cap 136 screwed at 137 upon an external thread et the outer extremity of the gear casing. The socket 127 is provided at its lower end with a preferably tapered opening 13S adapted to receive a reducing socket or a drill and is further provided `with a longitudinal opening-131) and a transverse aperture 140 there-h)t providing for the reception of the liattened end oi the drill and for the ejection ol' said drill hy means of a drift. At

its outer end, the sleeve 127 is extcriorly threaded at 141 for the attiwhment thereto ol any suitable chuck and l have shown a threaded cap 142 apertured at 143 intended to normallyY oecup)Y this exteviorly threaded portion in the ahsencc of a chuck, in order to prevent any injuryY to the external threads.

'lhe sleeve 131 is internnlfjyv threaded at 144 und with this threaded portion the feed screw 145 cone-1s, Said feed screw being provided with fnees 1411 and an aperture 147,i11 order that thesnme muy be readil)r actuated when desiredx it heing noted that the Out-e1' end ol said screw is tapered, as nt 14S, in the usual manner` l wish to call special attention to some of the novel features of my invention by the employment ol` which 1 am enabled, without dei-,reusing the ellicieney of the drill, to )r0- duee n eonstrlu-lion of minimum size which muy he employed in u small working space. The dill'erent sels of piston casings are leeaied ou opposite sides of the Year Casin di a' divide crankshaft, said iston casings may be readily removed for t e purpose of inspection or repairs. seen in Fig. 4, I have-shown the bracket 72 as being separate from the casing for convenienee in assembling. I seat it between the piston and gear casings- ByA the employment of a driving gear kevcd to thescparate crank shafts, I am enabled to form a'continuous crank shaft to which is imparted a continuous rotation owingr to the novel arrangement and correlation ofthe d iiferent pistons which are operatively connected therewith. It will be a parent to those skilled in this art that t e piston rods carried by the pistons-in each casing are operatively connected with the crank shaft in such a manner as to prevent any improper movement thereof and to take up very little room within the casing.

The distribution valves are s0 located that they do not interfere with the employment of suitable gearing, so that the tool 'operating mechanism will be accurately and positively actuated Aunder all conditions. .ince the valve mechanism lsoperatively connected with-and actuated by the crank shaft, lthe passage of the njotive fluid to actuate the different pistons will be accurately controlled'atall timeg.

t will now be apparent to those skilled in this art that I have devised a novel and useful construction of a portable pneumatic.

drill which emborliesthe features vof advantage cnumerated'as esirable 'in the state ment of invention an the above description and while I have in the present instance shown' that embodiment thereof which has been found in practice to give satisfactory and reliable results, it is to be understood that it is susceptible of modification in various particulars without departing from the spirit and scope of the. invention or sacrificing any of'its advantages.

' Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:- Y A 1. In a portable pneumatic drill, a divided casing, separable crank shafts having their inner ends juiitaposed and in'alinement with each other, driving mechanism therefor extensions on said casing, beariigs in sai extensions for the juxtaposed endsof said shafts, 'and tool o erating mechanism driven from saidcrank s afts.

2. In a portable pneumaticdrill, a divided casing, separable crank shafts havi their.

` ends juxtaposed and in alinement wit each casing, separable crank shafts having their In. the present construction, as'

said shafts having bearin nectiug the juxtaposed ends of said crank shafts, a train of gears driven thereby, and a tool operating mechanism actuated by the I end gear of said train of gears.

4'. In a portable pneumatic drill, a divided casing, separable crank shafts -havin their ends juxtaposed and in alinement wit i each-` other, driving mechanism therefor, connecting meansfor the juxtaposed ends of said crank shafts, a train of gears driven thereby, a tool operating mechanism actuated by the end gear of said train of ears, and controlling mechanism for said riving mechanism located. intermediate the same. 4. f

5. In a ortable pneumatic drill, a divided crank sna t having its inner ends juxtaposed and in alinement with each other, driving means therefor, a ear uniting the juxtaposed ends of sai shaft, tool operating mechanism driven by said crear, an eccentric actuated by said crank s aft, and valve mechanism for said driving means actuated by said eccentric.

6. In a casing, a rill spin e eccentrically located in bearings at one end thereof, a divided crank shaftlocated in the opposite `end of said casing and having its juxtaposed ends journaled in extensions within said casing, driving means for said crank shaft, a gear o eraortable 'eneumatic drill, adivided cran shaft, power transmission devices in# termcdiate said gear and s indle for driviny the latter, and valve mec iiism controlle by said crunk shaft and controlling said driving means.

7. ln-a portable pneumatic drill, a gear casin upper and lower piston casings carried y said gear casing, se arable crank shafts having their inner ends juxtaposed and in alinement with each other and adapted to be suitably driven, the outer ends of in said .piston casings, a gear constituting a connectin means for the juxtaposed ends of said cran shafts, driving means actuated by said connecting means and tool operating mechanism' driven by said driving means.

8. In a portable pneumatic drill, a gear casino', upper and lower piston casings carried by said gearcasing, a drill spindle eccentrically located in carings at the ex treme end of said gear casing, a se arable crank shaft having its juxtapose journaled in bearings within said casin gearing o eratively connecting said sha and spin e, drivin means for said crank shaft, and valve mec anisin actuated by said shaft and cont-rolling said driving means.

9. In a portable pneumatic drill, an elongated casing-upper and lower piston casinfrs carried therebyI a drill spindle eccentrically iocat-ed in bearings at one end of said gear ends j gears driven by said uniting .arnese '7 within said cylinders operatively connected with the adjacent crank shalt, fluid erts und passages communiciiting with lsaidl cylinder and said valve meeluiiiism, a train oll "enr, and tool operating mechanism artuatetlhy said train ol' gears.

1U. ln a portable pneumatic drill, the combination ol' n gear casing, piston easings l0 removably secured thereto, a pair of piston cylinders in each of said piston casings zirranged substantially at right angles to eaeli other, separable crank shafts mounted in -said casings, the pins of which are set opposite to each other, a. gear having sleeves extending therefrom for uniting said crank shafts, hearings with which said sleeves enlage, an eccentric mounted on one of said earings and adapted to interlock with the adjacent crank shaft, a pair of valve ineelianisms carried by said ear casing adapted to be actuated by sai eccentric, pistons mounted in said cylinder and operativenr connected with the adjacent crank shaft, ports and passages communicating with said cylinders and valve mechanisms, each of said valve mechanisms being adapted to con'- trol the pistons in the same vertical plane` a train of gears driven by said uniting (fear, and

a tool o eratiiig mechanism actuated by said pair of c ln ers being arrange l each pair of pistons within the same vertical plane, an eccentric carried hy one of said shafts, a strap for each valve mounted on said eccentric and o ieratively connected with its respective vallve, valve casings for said valves, llnid ports and passages conimuiiicating with' said piston cvlinders and 'said valves, and exhaust portsl leading from said valves.

2t. ln a portable pneumatic tool, an elongated gear casing, piston easings detaehably secured on opposite sides at one end thereof, separ'ahle crank shafts joui'naled in said casings, a drill spindle eccentrieally' journaled at the opposite end of said gear easing, a gear uniting said crank shafts, a gear inders arrange( mounted on said drill spindle, intermediate. gearing coaetinig` with said gears, piston cyl in pairs in said piston eusings, each paix; of cylinders being arranged at approximately right angles with each.

other, pist-ons within said cylinders, :i piston rod pivoted to eat-li piston, and independent vulve mechanisms controlling the passage. of motive lluid lo the pistons in the :saine vertical plane.

2;. ln a portable pneumatic drill, the combination of a geur easing, piston casings secured on opposite sides thereof, separable crank .shafts having their juxtaposed ends jouriialed in extensions of said gear easing,

a gear uniting said crank shafts, tool operating mechanism driven hy said gear, and driving ineens' for said crank shafts.

23. ln a portable pneumatic drill, a gear easing, a train of gears therein, a tool socket having :i shoulder,rotiitahly mounted in said casing, a gear carried hy said socket and enacting with said train of gears, a chain-' hered rap removably secured to said casing, a hall hearing between said eap and shoulder and having a sleeve extending within Suid cap, a feed screw engaging said cap, and means for actuating said train of gears.

24. in a portable pneumatic driil, a gear casing, .aV train or' gears therein, a tool socket having a shoulder rotatably mounted in said casing, a gear carried h v said sicket. and eoacting with sind train of gears, a cliamhered cap removably secured to sind casing into .the Ychamber of which the inner aperturcd end of said socket extends, a -hall hearing between said cap and shoulder and having a sleeve extending within said cap, u. feed screw engaging said cap, und means for actuating said train of gears.

125. In a portable pneumatic drill, a gear casing, upper and lower piston caziings cai'- ried h said gear casing, a separable crank shaft having its juxtaposed 'ends journalcd therein, pistons operatively connected with said shaft, a valve bushing in said easing havin(r au inlet port, discharge ports on opposite sides of said inlet part leading to said pistons,-

acap forsaid bushing having an exhaust port, a hollow valve open at one end having a groove controlling said bushing ports, cxhaust ports in said valve registering altermately with said discharge ports, a pin interal with said valve, and an'eccciitric carried y said crank shaft and operativ-el y connected with said pin.

26. In a portable pneumatic drill, an intermediate gear casing, piston casiugs secured on op insite sides thereof, separate crank shafts having their inner ends juxtaposed and in alineinent with eachother, a gear mounted thereon and to which the inner juxtaposed ends of said crank shafts are secured, said casings having a hearing, for the outer ends of said shafts, pistons operatively connected with said crank shaft, and vulve mechanism actuated by said crank shaft and coiitrollin the passage of motive lluid to actuatc said pistons.

27. ln a portable pneumatic drill, an interpiston casings, a driving gear uniting the inner ends of said shafts, said gear having a. sleeve extending therefrom engaging the hearing of said intermediate easing, a crank head adjacenfsaid hearing having a recess therein, an eccentric mounted on said hearing and having a lug interlocking with said recess, driving means for said crank shaft, and valve mechanism located intermediate said driving means and actuated hy said eccentric for eintrolling the passage of motive fiuid to actnac said driving means.

2%. in a. portable pneumatic drill, n gear casing, a drill spimllc'mnmted ir. hearings at, the extreme end thereof, a stud retnovahly carried h v said gear casing, a gear mounted thereon adapted to drive said spindle, a. second stud having an outwardly extending siecve, a gear nionnteifon said sleeve eo-acting with said first gear, a third stud mounted in said casing, a gear thereon co-ai-.ting with said second gear, asef-.ond gear on said third stud, piston casings removahly secured to said casing at the end opp. `te said drill spindic, a crank journaled in said easiugs, a. driv- .g gear mounted thereon and meshing with one of the gears carried h v said third studva set of pistons arranged suhstantiallj,Y at right angles with each ether in each of said piston casiugs` and operatively connected with said crank shaft, and a pair of valves munted in said gear easing intermediaiely of said piston mechanism and operatively connected with said crank shaft and controlling the. passage of motive'lluid to actuae the pistons in the, same vertical plane.

29. ln a portahle pneumaticY drill, a casing, a. crank shaft having a donhle throw jonririled therein, two sets of piston cylinders arranged at substantially right angles with cach other, a driving gear carried h v said crank' shaft, atranf of fears nnezmeihati sind piss ton cylinders ano driven hy said driving gear, a drill spindle journaled in the extreme end of said casing and actuated h v said train of gears, a pair (,f valves located intermediate said sets of ':ylinders and operatively connected with said crank shaft, and eruitrolling the passage of motive fluid to and from the pistons in the same vertical plane, piston rods for the piston in one vertical plane, straps seenred to said rods and said crank shafts, pisteu rods for the pistons in the other vertical plane, and yokes mounted on said straps and secured to the said last named connecting rods.

3f). ln a portahlc pneumatic drill, an intermediate easing, piston casiogs carried therehy. a pair of pistons arranged at suhst initially right angles to each other in each of said piston casings,separate crank shafts journaled neach iston easing and operatively e mnected with the pistons therein, a gea r u uiting said shafts, tool operating mechanism journaled in the extreme end ef said internualiate casing and driven hy said gear, and means for actuating said pistons.

3l. ln a drilling apparat-us, a. divided ca sing, r. separahle cran i shaft mounted therein and having its inner ends juxtaposed and in alinemenl: with each other, hearings within said casing for the juxtaposed ends of said crank shaft, a tool socket, located eccentrically to said crank shaft and power transmission devices intermediate. said crunk shaft and tool socket.

32. In a drilling a iparatus, a divided easing. a separable cran t shaft. mounted therein and having its inner ends juxtaposed and in alincment with each other, hearings within said easing for the juxtaposed ends` ol' said crank shaftf,pist'on nniehanisms foreach section of said separahie crank shaft, and a valve mechanism located int-erniediately of said pistonmechanisms.

312. lu a device of the character stated, adiiided casing, a. separahle crank shaft. mounted therein and having its inner ends juxtaposed and in alinement with each other, hearings within said easing for the `iuxta.- poseiLe-nils of said crank shaft, piston mechanisms for each section of said separahle crank' shaft, a valve mechanism located intermediat-ely of said piston mechanisms, a tool socket and )ower transmission devices intermediate selil socketand crank shaft.

34. ln a device of the character stated, an elongated gear casing, an upper and lower engine casing carried hy said gear casing,

upper and lower piston :mechanisms therein,

crank shafts having hearings for their juxtaposed ends nithni said casmgs, connections from said piston mechanisms to said crank shafts, a` valve mechanism carried hysaid :gear casing and located 1ntermediatel)Y of said piston mechanisms, a tool socket rotatahljfmonntcd in said geareasing at the end thereof opposite io-said crank shafts, and power transmission devices intermediate said tool soi-ketand crank shafts, said piston nn'idianisins heilig also located internwdiat ely of said crank shafts and tool socket.

33. ln a device of the character stated, an elongated gear easing, an upper and lower engine. casing rennn'ahl)Y secured lo said gear easing` upper and lower piston mechanisms carried iusaid engine casings, a separable crank shaft, hearings cont'ained within said casing for thc juxtaposed ends of said crank shaft, connections from said pistou mechanisms to said crank shafts, a valve nwehanislu located intermetliately of said piston ilu-ehanisms, a tool socket. rotatably mounted in said gear casing at, the end thereof opsosite to said crank shaft-s, a gear located at or in ar the juxtaposed ends of said crank shaftd, .unl

ings, and operatively connect-ed with said crank shaft, valve mechanisms in said gear casing operatively connected with said crankslialt, a drill spindle journaled in the end of 5 said gear casing opposite to said crank shaft,

thereof, a crank shaft journaled in said casings, a pair of piston civ'liiiders in each of said piston casings and arranged at an angle with cach other, pistons within said piston casings and operatively connected with said crank shalt, valve mechanisms in said gear casing operatively connected with said crank shalt, a drill spindle journaied iii thc ciid of said gear casiiur opposite. to said crank shalt, and power transmission devices intermediate said crank shalt and drill spindle,

said valve mechanisms and pistons lieing located intermcdiateljy of said crank shaft and `driii spindle.

47. ln a pneumatic drill, an elongated gear casing, piston casings on opposite sides thereol, a crank sliatt lionrnalcd in said casings, a. pair ol piston c vlindersin each of said piston cas-ings and arranged at an angle with each other, pistons within said pist-on casings, and

operatively connected with said crank shalt,

valve mechanisms in said gear easing operatively connected with said crank shalt, a drill spindle. journaled in the end ol said gear casing opposite to said crank shalt, and

power transmission devices intermediate said crank shaft and drill spindle, said valve mechanisms lieing located interuiedizitely oi said pistons and liotli said pistons and valve. mechanisms lie-ing located :ntermedistely ol' said crank sli-alt und drill spindle.

4S. ln a pneumatic drill, un elongated casing, a drill spindle eccentricall)r located in hearings at one. end thereof, a crank shaftV -oni'iniled in liearini's at the o i iosite end ol' said casing, driving means for said crank shalt, said shalt having a recess in the head thereof, an eccentric having an interlocking device for ,said recess, a valve mechanism located interniedialelv ol said crank shalt and drill spindle and actuated h v said eccentric for controlling said drivingr iiieains, and power transmission devices intermediate said crank siial't and dril spindle..

4l). ln a pneumatic drill, an elongated casing, a drill spindle ecce.ntricall)r located in hearings at one end thereof, a crank shaft journaled in hearings at the. opposite cnd of said casing, driving means for said crank shalt., Said shalt having a recess iii the. head thereof, an eccentric having an interlocking device for said recess, u volvi mechanism located inlerinediately of said crank shaft and drill spindle and actuated by said eccotitiic t'or coiitiiolliiig said driwiiigmeaiis, und

power transziiission devices intermediate said crank shaft and drill spindle, said driving means bein located above and below said valve mec nmism and intermediately of said crank shaft and drill spindle.

5t). In a. pneumatic drill, an elongated cas-- nig, a drill spindle ecccntrically located in' hearings at the extreme end thereof, a divided crank shaft jonrniiled in the opposite end of said casing and having a double throw with the pins thereof set opposite to' each other, driving means for said crank shaft, a

gear uniting the. sections ot' said crank sha-ft,

gearing coat-.ting with said gear and ope-ratively connected with said spindlefand a valve mechanism located intermediately of said driving means, said valve mechanism and driving means being -located intermediatcly of sii-id crank shaft and drill spindle.

51. In a pneumatic drill,a gear casing, piston casings on opposite sides thereof, a divided crank shaft mounted in said casings, a gear uniting the juxtaposed ends of said shalt, an eccentric carried lijr onel of the sections of said shalt, a pair of straps mounted on .said eccentric, separate Valve mechanisms actuated liy said straps, pistons operatively connected with the sections oi said crank siiiilt, a d rill spindle mounted in said gea-r casing, and power transmission devices intermediate. siiid crank shaftI and drill spindle.

'2. In a pneumatic drill, an elongated gear casing, piston casings secured thereto near one extremity on opposite. sides thereof, set of pistons arranged at an angle to cach other in each of said piston easings, a. divided ci ank shaft having its outer ends jouriialcd in said piston easings audits inner juxtaposed ends joiirnaled in hearings carried by said gear casing, ii drill spindle located iii said wearing easing eeeentrieiilly to said crank shalt, drivingr mechanism for actuating said crank shaft., means' for controlling the passage of motive lluid to iictuate said driving mechanism, and power transmission devices intermediate siiid crank shalt and drill spindle.

53. ln a pneumatic drill` a gear casing, piston easings seeured thereto on opposite sides thereof, u. crank shai t having/hearings for its outer ends in said piston ciisiiigs, a drill spindle having its hearings in said gear casing and lot-ated eeeentrieally to said crank shaft, driving mechanism for actuating said crank shaft, valve 'mechanism for controlling the iassage ol' motive lluid to actuate said driving mechanism, and a train of gearing in said gear casing` intermediate said crank shafteiind said driving spindle.

54. ln a pneumatic drill, a gear easing, piston ciisings secured thereto on opposite sides thereof, a crank shaft having hearings for its outer ends in said piston easiiigs, a drill spindlc having its hearings in said gear casing and located eeceiitrieally to said crank shaft, driving mechanism for .actuating said' crank shaft, valve mechanism for controlling the passage of motive fluid to actuate said drivingr mechanism, and a train of gearing in said gear casing intermediate said crank shaft and said driving spindle, said valvemechanism and driving mechanism heing located inter- 4mediate said crank shaft and drill `spindle.

.gear easing intermediate said` crank shaft. and said drivingr spindle, said valve mechanism` heing farricd )y said gear casing and heingj` located interniediatcly of said driving mechanism, and hcth said valve `mechanism and driving mechanism being located intermediateli-` of said crank shaft. and drill spindle.

56. in a pneumatic drill, a gear casing, piston casings secured thereto on opposite sides thereof, a divided crank shaft having bearings for its outer ends in said piston casings, the inner ends` of' said crank shaft lieing juxtaposed to each other, a gear having extensions thereon for uniting said juxtaposed ends, a drill spindle carried h v said gear casing, driving mechanism l'or said crank shaft, a valve meclainisni, and pover transmission devices intermediate said gear; and drill spindle.

57. ln a pneumatic drill, a gear casing, piston casings secured ahove and below said gear casing near an end thereof, a crank shaft lim ing its cuter ends joui'naled in said piston easings, driving mechanisms for said crank shaft, a valve iiieel'anisin located intermediate said driving mechanisms, a drill spindle located at the, end of said gear casing oppoL site to said crank shaft, and a train'ot gearing in said gear ,easing located intermediately of said crank slial't and driil spindle for actuating the latter.

lii a pneumatic. drill, a gear casing, piston casiiigs secured ahove and helow said gear easing near an end thereof, a crank shaft lia-:ing its outer ends jonrnalcd in said piston casings, driving mechanisms for said crank shaft, a valve mechanism located inleriiiediaic said driving mechanisms, a drill spindle located at. the end of said gear casing opposite to said crank shaft, and a train of Agearing in said gear casing located interincdiateljr of said crank shaft. and drill spindle. for actuating the latter, said driving mechanism and valve mechanism heiiig located intei'niediatcly of said crank shaft and diili spindle.

5E). ln :i pneumatic. drill, a gear casing,

piston ciisings seein-ed on opposite sides thereof, :i ciazik shaft having hearings in said piston casings, driving mechanisms for said crank shaft, a valve mechanism therefor, a stud having one end fixed in oiic of said piston casings and its opposite end projecting downwardly, a. plurality of studs each having' one end fixed in said gear casingl andv their free ends projecting oppositel)r to said first mentioned stud, a driving spindle, and gearing intermediate said crank shaft., studs, and spindle for operating thc latter.

G0. In a pneumatic drill, a gear casing, piston casings secured on opposite sides thereof, a. crank shaft having hearings in said piston casiiigs, driving mechanisms for said crank sha-ft., a valve mechanism therefor, a stud having one end fixed in one of said piston casings and its opposite end projecting downwardly, a plurality of studs each having one end fixed in said gear casing and their fred ends projecting oppositely to said first izentioned stud, a driving spindle, and cariniiinterniediate said crank shaft, stilts, and spindle. for operating the latter, said valve mechanism being located interinediatcly of said crank shaft and drill spindle.

61. In a. pneii/iiiatic drill, a gear casing, piston casings secured on opposite sides thereof, a crank shaft. having hearings in said piston casings, driving mechanisms for said crank shaft., a valve mechanism therefor, a stud having one'end fixed. in one of said piston casings, and its opposite end projecting downwardly, a plurality of studs each having one end fixed in said gear casing and their free ends projecting oppositely to said irst. mentioned stiid, a driving spindle, and gearing intermediate said crank shaft, studs, and spindle for operating the latter, said Valve and driving ii'iec'iianisnis being located interniediately of said crank shaft and drill spindle.

(r2. In a pneumatic. drill, a -gear casing, a

drill spindle mounted in one end thereof, a

crank shaft located in the opposite end thereof, piston easings secured to said gear casing, driving mechanisms in said piston casing for said cran shaft, valve mechanisms operated h v said crank shaft for controlling said driving mechanisms, said valve. and driving niccliaiiisius heing located int-crinediately of said drill spindle and crank shaft., and power transmission devices in said gear casing and located interinddiiiieljr of said drill spindle and crank slurf".

(B2i. ln a pneumatic. drill, a gear casing, piston easings secured in fixed position on opposite sides thereof, a crank shaft mounted in said casings, a single eccentric. carried h v said shaft., a pair of straps.mounted on said eccentric, separate valve. mechanisms actuated hy said straps, and pistons operatively connected with said crank shaft and cona single eccentric carried h v said shaft, a 136 and istons operatively connected with said (Tang shaft und controlled by said valve mechimisms, in combination with a d"ill s inzlle and wearing intermediate said crank sliut and drill spindle.

l HENRY JAMES KIMMAN. 'masses EDWIN M MACKI GEO. L REBS. 

